CSAD and obesity due to melanocortin 4 receptor deficiency: Further extrapolating along these important findings, future studies should assess obesity-related changes in another major rate-limiting enzyme called cysteine sulfinic acid decarboxylase (CSAD), which is also linked to taurine biosynthesis in fat by catalysing decarboxylation of cysteine sulfinate to hypotaurine biosynthesis and evaluate its effects on adipose function and metabolic profiles in humans.